公开(公告)号：US20140355474A1

公开(公告)日：2014-12-04

申请号：US14464752

申请日：2014-08-21

Applicant: Texas Instruments Incorporated

Inventor： Shu Du ,  Anand G. Dabak ,  Xiaolin Lu ,  Il Han Kim

IPC: H04B3/54 ,  H04L12/26

CPC classification number: H04B3/54 ,  H04B3/544 ,  H04B2203/5408 ,  H04B2203/5466 ,  H04B2203/5495 ,  H04L7/00 ,  H04L12/10 ,  H04L43/0823

Abstract: A power line communication (PLC) device comprises a processor and a memory coupled to the processor. The memory is configured to store program instructions executable by the processor to cause the PLC device perform operations. One or more time slots are sequentially scan in each of a plurality of frequency bands. A packet transmitted by a second PLC device to the PLC device over one of the plurality of frequency bands is detected. Additional packets received from the second PLC device across the plurality of frequency bands based, at least in part, upon the detected packet are synchronized. The additional packets are organized in a plurality of frames, each of the plurality of frames having been transmitted by the second PLC device to the PLC device over a respective one of the plurality of frequency bands. Each frame has a plurality of time slots, and each time slot has a pair of beacon and bandscan packets, Each bandscan packet includes information indicating a frequency band distinct from any of the plurality of different frequency bands to be used by the second PLC device to communicate with the first PLC device in a direction from the second PLC device to the first PLC device.

Abstract translation: 电力线通信（PLC）设备包括处理器和耦合到处理器的存储器。 存储器被配置为存储可由处理器执行的程序指令，以使PLC设备执行操作。 在多个频带的每一个中顺序地扫描一个或多个时隙。 检测由第二PLC设备通过多个频带中的一个发送到PLC设备的分组。 至少部分地基于检测到的分组，跨多个频带从第二PLC设备接收的附加分组被同步。 所述附加分组被组织成多个帧，所述多个帧中的每一个已经由所述第二PLC设备通过所述多个频带中的相应一个频带发送到所述PLC设备。 每帧具有多个时隙，并且每个时隙具有一对信标和频带扫描分组，每个频带扫描分组包括指示要由第二PLC设备使用的多个不同频带中的任一个的频带的信息， 与第一PLC设备在从第二PLC设备到第一PLC设备的方向通信。

公开(公告)号：US09172431B2

公开(公告)日：2015-10-27

申请号：US14464752

申请日：2014-08-21

Applicant: Texas Instruments Incorporated

Inventor： Shu Du ,  Anand G. Dabak ,  Xiaolin Lu ,  Il Han Kim

IPC: H04B3/54 ,  H04L12/10 ,  H04L12/26 ,  H04L7/00

CPC classification number: H04B3/54 ,  H04B3/544 ,  H04B2203/5408 ,  H04B2203/5466 ,  H04B2203/5495 ,  H04L7/00 ,  H04L12/10 ,  H04L43/0823

Abstract: A power line communication (PLC) device comprises a processor and a memory coupled to the processor. The memory is configured to store program instructions executable by the processor to cause the PLC device perform operations. One or more time slots are sequentially scan in each of a plurality of frequency bands. A packet transmitted by a second PLC device to the PLC device over one of the plurality of frequency bands is detected. Additional packets received from the second PLC device across the plurality of frequency bands based, at least in part, upon the detected packet are synchronized. The additional packets are organized in a plurality of frames, each of the plurality of frames having been transmitted by the second PLC device to the PLC device over a respective one of the plurality of frequency bands. Each frame has a plurality of time slots, and each time slot has a pair of beacon and bandscan packets, Each bandscan packet includes information indicating a frequency band distinct from any of the plurality of different frequency bands to be used by the second PLC device to communicate with the first PLC device in a direction from the second PLC device to the first PLC device.

Abstract translation: 电力线通信（PLC）设备包括处理器和耦合到处理器的存储器。 存储器被配置为存储可由处理器执行的程序指令，以使PLC设备执行操作。 在多个频带的每一个中顺序地扫描一个或多个时隙。 检测由第二PLC设备通过多个频带中的一个发送到PLC设备的分组。 至少部分地基于检测到的分组，跨多个频带从第二PLC设备接收的附加分组被同步。 所述附加分组被组织成多个帧，所述多个帧中的每一个已经由所述第二PLC设备通过所述多个频带中的相应一个频带发送到所述PLC设备。 每帧具有多个时隙，并且每个时隙具有一对信标和频带扫描分组，每个频带扫描分组包括指示要由第二PLC设备使用的多个不同频带中的任一个的频带的信息， 与第一PLC设备在从第二PLC设备到第一PLC设备的方向通信。

公开(公告)号：US20150171922A1

公开(公告)日：2015-06-18

申请号：US14630990

申请日：2015-02-25

Applicant: Texas Instruments Incorporated

Inventor： Shu Du ,  Anand G. Dabak ,  Xiaolin Lu ,  Il Han Kim

IPC: H04B3/54 ,  H04L7/00

CPC classification number: H04B3/54 ,  H04B3/544 ,  H04B2203/5408 ,  H04B2203/5466 ,  H04B2203/5495 ,  H04L7/00 ,  H04L12/10 ,  H04L43/0823

Abstract: Systems for channel selection in power line communications (PLC) are described. In some embodiments, a PLC device may include a processor and a memory. The memory stores instructions executable by the processor to cause the PLC device perform operations. One or more time slots in each of a plurality of frequency bands are sequentially scanned. A packet transmitted by a second PLC device to the PLC device over one of the plurality of frequency bands is detected. Additional packets received from the second PLC device are synchronized across the plurality of frequency bands based, at least in part, upon the detected packet. The additional packets are organized in a plurality of frames. Each of the plurality of frames having been transmitted by the second PLC device to the PLC device over a respective one of the plurality of frequency bands. Each frame has a plurality of time slots, and each time slot has a pair of beacon and bandscan packets.

Abstract translation: 描述了电力线通信（PLC）中通道选择的系统。 在一些实施例中，PLC设备可以包括处理器和存储器。 存储器存储可由处理器执行以使PLC设备执行操作的指令。 顺序地扫描多个频带中的每一个中的一个或多个时隙。 检测由第二PLC设备通过多个频带中的一个发送到PLC设备的分组。 至少部分地基于检测到的分组，从第二PLC设备接收的附加分组跨多个频带同步。 附加分组被组织成多个帧。 多个帧中的每一个已经由第二PLC设备通过多个频带中的相应一个发送到PLC设备。 每个帧具有多个时隙，并且每个时隙具有一对信标和带扫描分组。

公开(公告)号：US20150163134A1

公开(公告)日：2015-06-11

申请号：US14624065

申请日：2015-02-17

Applicant: Texas Instruments Incorporated

Inventor： Ramachandran Ananthakrishnan ,  Shu Du ,  Xiaolin Lu

IPC: H04L12/741 ,  H04B3/54

CPC classification number: H04L45/54 ,  H04B3/54 ,  H04B3/542 ,  H04B2203/5445 ,  H04L45/12 ,  H04L45/34 ,  H04W40/28

Abstract: Systems and methods for routing protocols for power line communications (PLC) are described. In some embodiments, a method may include transmitting a one-hop broadcast request message to a plurality of PLC devices in a mesh network and receiving a response from each of the devices. The method may also include selecting one of the devices as a bootstrapping agent, sending a join request to a bootstrapping server through the bootstrapping agent, and, in response to successfully joining the network, setting the bootstrapping agent as a next hop toward a bootstrapping server. In another embodiment, a method may include maintaining a routing table for a plurality of PLC devices in a mesh network, receiving a join request from a PLC device, accepting the request, and updating the table to add a record corresponding to the PLC device; the record setting the bootstrapping agent as a penultimate hop toward the PLC device.

Abstract translation: 描述了用于电力线通信（PLC）的路由协议的系统和方法。 在一些实施例中，一种方法可以包括向网状网络中的多个PLC设备发送一跳广播请求消息并从每个设备接收响应。 该方法还可以包括选择一个设备作为引导代理，通过引导代理向引导服务器发送加入请求，并且响应于成功加入网络，将引导代理设置为向引导服务器的下一跳 。 在另一个实施例中，一种方法可以包括维护网状网络中的多个PLC设备的路由表，从PLC设备接收连接请求，接受该请求，并更新该表以添加对应于该PLC设备的记录; 记录将引导代理设置为PLC设备的倒数第二跳。

公开(公告)号：US10833890B2

公开(公告)日：2020-11-10

申请号：US16154626

申请日：2018-10-08

Applicant: Texas Instruments Incorporated

Inventor： Shu Du ,  Robert W. Liang ,  Xiaolin Lu

IPC: H04L12/413 ,  H04B3/54 ,  H04L5/00

Abstract: Systems and methods for carrier sense multiple access (CSMA) protocols for power line communications (PLC) are described. In some embodiments, a method may include performing a virtual carrier sensing operation and, in response to the virtual carrier sensing operation indicating that a communication channel is idle, calculating a contention window. The method may also include performing a physical carrier sensing operation subsequent to the virtual carrier sensing operation, the physical carrier sensing operation based, at least in part, upon the contention window. In response to the physical carrier sensing operation indicating that the communication channel is idle, the method may then include transmitting data over the channel. In other embodiments, another method may include determining that a data transmission is a unicast transmission and that an acknowledgement message has not been received. The method may further include incrementing a backoff parameter and repeating one or more carrier sense operations.

公开(公告)号：US09219526B2

公开(公告)日：2015-12-22

申请号：US14630990

申请日：2015-02-25

Applicant: Texas Instruments Incorporated

Inventor： Shu Du ,  Anand G. Dabak ,  Xiaolin Lu ,  Il Han Kim

IPC: H04B3/54 ,  H04L12/10 ,  H04L12/26 ,  H04L7/00

CPC classification number: H04B3/54 ,  H04B3/544 ,  H04B2203/5408 ,  H04B2203/5466 ,  H04B2203/5495 ,  H04L7/00 ,  H04L12/10 ,  H04L43/0823

Abstract: Systems for channel selection in power line communications (PLC) are described. In some embodiments, a PLC device may include a processor and a memory. The memory stores instructions executable by the processor to cause the PLC device perform operations. One or more time slots in each of a plurality of frequency bands are sequentially scanned. A packet transmitted by a second PLC device to the PLC device over one of the plurality of frequency bands is detected. Additional packets received from the second PLC device are synchronized across the plurality of frequency bands based, at least in part, upon the detected packet. The additional packets are organized in a plurality of frames. Each of the plurality of frames having been transmitted by the second PLC device to the PLC device over a respective one of the plurality of frequency bands. Each frame has a plurality of time slots, and each time slot has a pair of beacon and bandscan packets.

Abstract translation: 描述了电力线通信（PLC）中通道选择的系统。 在一些实施例中，PLC设备可以包括处理器和存储器。 存储器存储可由处理器执行以使PLC设备执行操作的指令。 顺序地扫描多个频带中的每一个中的一个或多个时隙。 检测由第二PLC设备通过多个频带中的一个发送到PLC设备的分组。 至少部分地基于检测到的分组，从第二PLC设备接收的附加分组跨多个频带同步。 附加分组被组织成多个帧。 多个帧中的每一个已经由第二PLC设备通过多个频带中的相应一个发送到PLC设备。 每个帧具有多个时隙，并且每个时隙具有一对信标和带扫描分组。

公开(公告)号：US09094234B2

公开(公告)日：2015-07-28

申请号：US14264676

申请日：2014-04-29

Applicant: Texas Instruments Incorporated

Inventor： Shu Du ,  Robert W. Liang ,  Xiaolin Lu

IPC: H04L12/413 ,  H04B3/54 ,  H04L5/00

CPC classification number: H04L12/413 ,  H04B3/544 ,  H04L5/0096

Abstract: Systems and methods for carrier sense multiple access (CSMA) protocols for power line communications (PLC) are described. In some embodiments, a method may include performing a virtual carrier sensing operation and, in response to the virtual carrier sensing operation indicating that a communication channel is idle, calculating a contention window. The method may also include performing a physical carrier sensing operation subsequent to the virtual carrier sensing operation, the physical carrier sensing operation based, at least in part, upon the contention window. In response to the physical carrier sensing operation indicating that the communication channel is idle, the method may then include transmitting data over the channel. In other embodiments, another method may include determining that a data transmission is a unicast transmission and that an acknowledgement message has not been received. The method may further include incrementing a backoff parameter and repeating one or more carrier sense operations.

Abstract translation: 描述了用于电力线通信（PLC）的载波侦听多路访问（CSMA）协议的系统和方法。 在一些实施例中，方法可以包括执行虚拟载波侦听操作，并且响应于指示通信信道空闲的虚拟载波侦听操作，计算竞争窗口。 该方法还可以包括在虚拟载波感测操作之后执行物理载波感测操作，至少部分地基于竞争窗口进行物理载波感测操作。 响应于指示通信信道空闲的物理载波感测操作，该方法然后可以包括通过信道发送数据。 在其他实施例中，另一种方法可以包括确定数据传输是单播传输，还没有接收到确认消息。 该方法还可以包括增加退避参数并重复一个或多个载波检测操作。

公开(公告)号：US20190044751A1

公开(公告)日：2019-02-07

申请号：US16154626

申请日：2018-10-08

Applicant: Texas Instruments Incorporated

Inventor： Shu Du ,  Robert W. Liang ,  Xiaolin Lu

IPC: H04L12/413 ,  H04L5/00 ,  H04B3/54

CPC classification number: H04L12/413 ,  H04B3/544 ,  H04L5/0096

Abstract: Systems and methods for carrier sense multiple access (CSMA) protocols for power line communications (PLC) are described. In some embodiments, a method may include performing a virtual carrier sensing operation and, in response to the virtual carrier sensing operation indicating that a communication channel is idle, calculating a contention window. The method may also include performing a physical carrier sensing operation subsequent to the virtual carrier sensing operation, the physical carrier sensing operation based, at least in part, upon the contention window. In response to the physical carrier sensing operation indicating that the communication channel is idle, the method may then include transmitting data over the channel. In other embodiments, another method may include determining that a data transmission is a unicast transmission and that an acknowledgement message has not been received. The method may further include incrementing a backoff parameter and repeating one or more carrier sense operations.

公开(公告)号：US10097371B2

公开(公告)日：2018-10-09

申请号：US14744295

申请日：2015-06-19

Applicant: Texas Instruments Incorporated

Inventor： Shu Du ,  Robert W. Liang ,  Xiaolin Lu

IPC: H04L12/413 ,  H04B3/54 ,  H04L5/00

Abstract: Systems and methods for carrier sense multiple access (CSMA) protocols for power line communications (PLC) are described. In some embodiments, a method may include performing a virtual carrier sensing operation and, in response to the virtual carrier sensing operation indicating that a communication channel is idle, calculating a contention window. The method may also include performing a physical carrier sensing operation subsequent to the virtual carrier sensing operation, the physical carrier sensing operation based, at least in part, upon the contention window. In response to the physical carrier sensing operation indicating that the communication channel is idle, the method may then include transmitting data over the channel. In other embodiments, another method may include determining that a data transmission is a unicast transmission and that an acknowledgement message has not been received. The method may further include incrementing a backoff parameter and repeating one or more carrier sense operations.

公开(公告)号：US20150288534A1

公开(公告)日：2015-10-08

申请号：US14744295

申请日：2015-06-19

Applicant: Texas Instruments Incorporated

Inventor： Shu Du ,  Robert W. Liang ,  Xiaolin Lu

IPC: H04L12/413 ,  H04L5/00 ,  H04B3/54

CPC classification number: H04L12/413 ,  H04B3/544 ,  H04L5/0096

Abstract: Systems and methods for carrier sense multiple access (CSMA) protocols for power line communications (PLC) are described. In some embodiments, a method may include performing a virtual carrier sensing operation and, in response to the virtual carrier sensing operation indicating that a communication channel is idle, calculating a contention window. The method may also include performing a physical carrier sensing operation subsequent to the virtual carrier sensing operation, the physical carrier sensing operation based, at least in part, upon the contention window. In response to the physical carrier sensing operation indicating that the communication channel is idle, the method may then include transmitting data over the channel. In other embodiments, another method may include determining that a data transmission is a unicast transmission and that an acknowledgement message has not been received. The method may further include incrementing a backoff parameter and repeating one or more carrier sense operations.

Abstract translation: 描述了用于电力线通信（PLC）的载波侦听多路访问（CSMA）协议的系统和方法。 在一些实施例中，方法可以包括执行虚拟载波侦听操作，并且响应于指示通信信道空闲的虚拟载波侦听操作，计算竞争窗口。 该方法还可以包括在虚拟载波感测操作之后执行物理载波感测操作，至少部分地基于竞争窗口进行物理载波感测操作。 响应于指示通信信道空闲的物理载波感测操作，该方法然后可以包括通过信道发送数据。 在其他实施例中，另一种方法可以包括确定数据传输是单播传输，还没有接收到确认消息。 该方法还可以包括增加退避参数并重复一个或多个载波检测操作。